JP2005184461A - Apparatus and method of controlling microphone - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a microphone device capable of setting a microphone at the same position or orientation for a user every time and keeping a good speech recognition rate and constant quality of collected sounds. <P>SOLUTION: The installation state of the microphone 2 is changed by position sensors 23 (23a, 23b and 23c) and position adjustment motors 21 (21a, 21b and 21c) based on an operation instruction by a user. In addition, the installation state for each user is stored in a memory device 33, and the microphone is driven so that the stored installation state can be set when the user is subsequently selected. The installation state of the microphone is varied according to a predetermined movement pattern, and the installation state where sound collection of the microphone is the maximum is stored for each user. When the user is subsequently selected, the microphone is driven to attain the stored installation state. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a microphone control device and a microphone control method provided in a vehicle interior of a vehicle, for example.

2. Description of the Related Art Conventionally, a microphone is provided on a vehicle instrument panel or the like, a voice uttered by a speaker is collected by the microphone, and the voice is recognized by comparing the collected voice with a dictionary that has been stored in advance. Is known (Patent Document 1).
Japanese Patent Laid-Open No. 2003-140687

For vehicle microphones, it is preferable to tune the installation position and directivity according to the user. However, since it was complicated to ship the vehicle by finely adjusting them for each user, it is average. It is decided to select and install a position that can withstand use.
However, the sound volume varies from user to user, and the position of the user's mouth varies with the microphone mounting position and mounting direction, so the microphone cannot properly pick up the speaker's voice, and the voice recognition rate decreases, There was a problem that the quality of the collected sound was degraded.

  In order to solve the above problems, the present invention can set a microphone at the same position or orientation each time for each user, and can maintain a good voice recognition rate and the quality of collected voice and An object is to provide a microphone control method.

Therefore, according to the present invention, a microphone whose mounting state can be changed is changed based on an operation instruction by the user, the microphone mounting state is changed, and the mounting state is stored for each user, and then the user selects In such a case, the microphone is driven so that the stored mounting state is obtained.
In addition, the microphone mounting state in which the mounting state can be changed is changed according to a predetermined movement pattern, and is stored for each user in the mounting state where the sound collection of the microphone is maximized, and then the user is selected. In such a case, the microphone is driven so that the stored mounting state is obtained.

  According to the present invention, it is possible to reproduce the microphone attachment state adjusted to an appropriate position for each user, and it is possible to maintain a good voice recognition rate or sound collection voice quality.

Embodiments of the present invention will be described below. FIG. 1 is a block diagram of a speech recognition apparatus to which the present invention is applied.
The speech recognition apparatus includes a speech recognition control unit (hereinafter referred to as speech recognition C / U) 1, a microphone 2, a display 3, a speaker 4, a selection determination switch 5 as an operation unit, a speech recognition start switch connected thereto. 6a, voice recognition end switch 6b, user selection switch 7, microphone position adjustment switch 8, registration switch 9, volume indicator 10, and automatic adjustment switch 11.
The voice recognition C / U1 further includes a position adjustment motor 21 (21a, 21b, 21c) that drives the microphone 2 so that the position of the microphone 2 can be changed, and a position sensor 23 (23a, 23b, 23c) is connected.

A detailed description of each component is given below.
The voice recognition C / U 1 includes a central processing unit (hereinafter referred to as CPU) 31, a read-only memory (hereinafter referred to as ROM) 32 a connected thereto, a random access memory (hereinafter referred to as RAM) 32 b, and a storage device 33. An A / D converter (A / D) 34a that converts an analog signal from the microphone 2 into a digital signal and inputs it to the CPU 31; a digital audio output signal from the CPU 31 is converted into an analog signal and output to the speaker 4 It is composed of a D / A converter (D / A) 34b.

The ROM 32a stores a program that runs on the CPU 31 and preset data that requires the program. The RAM 32b temporarily stores data being processed by the CPU 31.
The storage device 33 is, for example, a hard disk device, and includes a dictionary for converting into phonetic characters corresponding to a voice pattern, a dictionary for analogizing words based on the relationship between before and after sentences, a kanji dictionary, and the like. In addition, the storage device 33 stores the setting position of the microphone 2 in an address corresponding to a later-described numeric key button of the user selection switch 7 so that writing / reading is possible.

The selection / determination switch 5 is composed of a cursor movement switch and a determination / cancellation switch, and allows the operator to select and determine candidate words / phrases of a sentence converted from speech to characters displayed on the display 3. .
The microphone position adjustment switch 8 includes left and right switches 42L and 42R for instructing the CPU 31 to move the microphone 2 in the left and right direction while pressed, and a front and rear direction switch 42F for instructing movement of the microphone 2 in the front and rear direction while pressed. 42B, a composite switch having a knob switch 41 for instructing movement of the microphone 2 in the vertical direction while pinching with the fingertip and rotating left or right.
The user selection switch 7 is a switch provided with a plurality of numeric key buttons each having a light emitting portion on which numbers are drawn.

  Display 3, speaker 4, selection decision switch 5, voice recognition start switch 6a, voice recognition end switch 6b, user selection switch 7, microphone position adjustment switch 8, registration switch 9, automatic adjustment switch 11, volume indicator 10 Are arranged together on the instrument panel.

FIG. 2 shows the arrangement of the position adjustment motor 21 and the position sensor 23.
A guide rail 25Y is provided on the ceiling in front of the front seat of the passenger compartment so as to extend in the front-rear direction, and holds the pedestal 28Y in a slidable manner. The pedestal 28Y is driven in the front-rear direction by a loop-shaped wire 27Y that is stretched between a drive drum 22b and a drum 26Y that are rotationally driven by a position adjustment motor 21b that can rotate forward and backward.
A guide rail 25X extending in the left-right direction of the vehicle body is fixed to the base 28Y. The guide rail 25X slidably holds the base 28X. The pedestal 28X is also driven in the left-right direction by a loop-shaped wire 27X stretched between a drive drum 22a and a drum 26X that are rotationally driven by a position adjustment motor 21a that can rotate forward and backward.

The pedestal 28X is provided with a position adjustment motor 21c, and a screw shaft 29b vertically penetrates a screw hole of a drive nut 22c that is rotationally driven by the position adjustment motor 21c. The cylinder 24 is fixed to the case of the position adjustment motor 21c. A pair of opposed guide grooves (not shown) are provided on the inner surface of the cylinder 24 in the axial direction, and a pair of guide protrusions 29a provided on the side surface of the microphone 2 are slidably fitted in the guide grooves. The guide groove and the guide protrusion 29a are held so that the microphone 2 does not rotate.
When the drive nut 22c is driven and rotated by the position adjustment motor 21c, the microphone 2 moves in the vertical direction together with the screw shaft 29b.
The position adjustment motors 21a, 21b, and 21c are provided with position sensors 23a, 23b, and 23c, respectively, and detect the rotation angle.
FIG. 3 is a view showing a situation where the guide rails 25X and 25Y are installed on the front ceiling of the vehicle interior.
The positional relationship with the map light 43, the front window 44, the rearview mirror 45, and the sun visor 46 is shown.

FIG. 4 is a diagram illustrating an operation due to the vertical position in the tube 24 of the microphone 2. The open end side of the cylinder 24 is the lower side. When the microphone 2 is housed in the cylinder 24 as shown in (a), the directivity is strong, and when exposed from the cylinder 24 as shown in (b), the directivity is weak. .
If the ambient noise is relatively large, adjusting the knob switch 41 to the state (a) can improve the speech recognition rate of the speaker.

The function of the CPU 31 will be described below.
When the voice recognition start switch 6a is turned on, voice recognition processing of voice input from the microphone 2 is started. The voice recognition process is ended by turning on the voice recognition end switch 6b.
The sound collected by the microphone 2 is converted into a digital signal by the A / D converter 34 a and input to the CPU 31. The CPU 31 converts the speech into speech patterns for each phrase, and the dictionary stored in the storage device 33 has the highest accuracy in the speech pattern.

When the operator depresses one of the numeric key buttons of the user selection switch 7, the CPU 31 turns on the light emitting portion, displays that the numeric key button is in a selected state, and presses the illuminated numeric key button again. When it is pressed, it goes off and enters a non-selected state.
If you press a numeric key button that is not lit when one numeric key button is lit, the numeric key button that was lit first goes off, and the newly pressed numeric key button lights when selected. It becomes a state.

When the operator operates the microphone position adjustment switch 8 to adjust the microphone position so that it is convenient for the user and then presses the registration switch 9, it corresponds to the numeric key buttons of the user selection switch 7 selected by the operator. The position signal from the position sensor 23 is stored in the memory address of the storage device 33 to be readable.
When the microphone position is stored at the address corresponding to the selected numeric key button, the light emitting part of the numeric key button flashes for a while, and the operation that the microphone position is registered for the numeric key button is operated. The user is informed, and then the lighting state indicating the normal selection state.

The CPU 31 dynamically displays the volume level collected by the microphone 2 on the volume indicator 10 with the bar length. The level position of the appropriate target volume is also displayed on the volume indicator 10.
When the position adjustment switch 8 is operated, the CPU 31 controls the position of the microphone 2 in the front-rear direction, the left-right direction, and the up-down direction.
When the operator selects the numeric key button of the user selection switch 7, the registered microphone position is read from the corresponding address in the storage device 33, and a signal for driving the position adjustment motor 21 is output. The microphone 2 is moved to the position.
Further, when the automatic adjustment switch 11 is turned on, the microphone position is moved according to the position sequence in a predetermined movement pattern, and the microphone position where the volume level collected from the microphone 2 is equal to or higher than the target level is searched for. The position is stored in the address corresponding to the selected numeric key button of the user selection switch 7.

Next, based on FIG. 5, the flow of control for operating the microphone position adjustment switch to move the microphone position and registering the position will be described.
When an unillustrated ignition switch is turned on, the speech recognition apparatus is activated. The operator sets the seat in a state suitable for him and keeps outputting sound at a constant volume while operating each switch of the microphone position adjustment switch 8 so that his / her voice is properly picked up by the microphone 2. .
The following processing flow is processed as a program of the CPU 31.

In step 101, it is checked whether or not the microphone position adjustment switch 8 has been operated. If not, step 101 is repeated. If it has been operated, the process proceeds to step 102.
In step 102, while any of the left and right direction switches 42R and 42R, the front and rear direction switches 42F and 42B, and the composite switch having the knob switch 41 is being operated, the position corresponding to the moving direction of the microphone position indicated by the switch A command signal for rotating any of the adjustment motors 21a, 21b, and 21c in the instructed direction is output.
Note that the position signals from the position sensors 23a, 23b, and 23c are input to the CPU 31, and when it is detected that the limit of the movable range has been reached, even if one of the microphone position adjustment switches 8 is operated. No command signal is output.

In step 103, the position adjustment motors 21a, 21b, 21c corresponding to the operated switch of the microphone position adjustment switch 8 drive the microphone 2 in the operated direction based on the command signal.
In step 104, the target volume level and the volume level currently picked up by the microphone 2 are displayed on the volume indicator 10. The target volume level is set by reading data preset in the ROM 32a.
In step 105, it is checked whether or not the registration switch 9 has been operated. When the registration switch 9 is operated, the process proceeds to the switch 106. If not, the operator returns to step 101 and repeats step 105 as he / she continues to operate the microphone position adjustment switch 8 so that the target volume level is reached while looking at the volume indicator 10.

  The operator looks at the volume indicator 10, finds an appropriate position of the microphone 2 that exceeds the target volume level, and operates the user selection switch 7 in order to memorize his / her microphone position so that it can be reproduced at any time in the future. . In step 106, it is checked whether any numeric key button is on. The numeric key button that is turned on lights up.

If it is on, the process proceeds to step 107, and the set position of the user selection switch 7 is read. If not, step 106 is repeated.
In step 108, the current position signal of each position sensor 23 is read out and stored in the address of the storage device 33 corresponding to the numeric key button on which the user selection switch 7 is turned on.
In step 109, the numeric key button on which the user selection switch 7 is turned on blinks for a while to notify the operator of the completion of registration, and then this series of processing is terminated.

Next, based on FIGS. 6 and 7, the flow of control for automatically moving the microphone position using the automatic adjustment switch, searching for an appropriate position for the target volume level, and automatically registering it will be described. The following processing flow is processed as a program of the CPU 31.
The operator sets the seat in a state suitable for him.
In step 201, it is checked whether or not the automatic adjustment switch 11 is on. If it is on, the process proceeds to step 202. If it is not on, step 201 is repeated.
In step 202, it is checked whether any of the numeric key buttons of the user selection switch 7 is on. If it is on, the process proceeds to step 203. If it is not on, step 202 is repeated.

In step 203, the target volume level displayed on the volume indicator 10 is set. This reads and sets data preset in the ROM 32a.
In step 204, a command signal is output to each position adjustment motor 21 so as to set a microphone at each target position in the position sequence set in a predetermined microphone position movement pattern stored in the ROM 32a.

For example, the movement pattern is as follows.
The initial position of the microphone 2 is the end on the passenger seat side of the movable range for the left-right direction position, the front end side of the movable range for the front-rear direction position, and the body of the microphone 2 on the cylinder 24 for the vertical position. The position is almost stored.
For example, the position adjustment motor 21a is first driven to move the microphone position along the guide rail 25X from the passenger seat side to the driver seat side. Next, the position adjustment motor 21b is driven to move the microphone position backward. Finally, the position adjustment motor 21c is driven to move the microphone position downward.
In this series of movement patterns of the microphone 2, the maximum volume position is searched according to steps 204 to 213.

In step 205, the position adjustment motor 21 is driven under the control of the CPU 31.
The operator waits for the microphone position to be automatically set while outputting sound at a constant volume level.
In step 206, the volume level picked up by the microphone 2 is displayed on the volume indicator 10.
In step 207, an average volume for a predetermined time at each target position of the pattern is calculated. In step 208, a signal from each position sensor 23 at that timing is read.
In step 209, automatic adjustment is started and it is checked whether or not it is the first target position of the movement pattern. In the first case, the process proceeds to step 211, and in the case of the second and subsequent target positions, the process proceeds to step 210.

In step 210, the volume level at the current target position of the movement pattern is compared with the volume level stored at the previous target position of the movement pattern, and the volume level at the current target position of the movement pattern is higher. Check if it is.
If the current is smaller, the process proceeds to step 213. If the current is larger, the process proceeds to step 211.
In step 211, the current microphone position of the movement pattern and its volume level are stored in the RAM 32b.

In step 212, it is checked whether the target volume level has been exceeded. If not, the process proceeds to step 213. If exceeded, the process proceeds to step 215.
In step 213, it is checked whether or not a predetermined movement pattern position sequence has been completed. If not completed, the process returns to step 204 to continue moving the microphone position. If the position sequence ends, the process proceeds to step 214.
In step 214, the maximum volume position stored in the RAM 32b is read, a command output is output to the position adjustment motor 21 to move the microphone 2 to that position, and the microphone 2 is set. After step 214, the process proceeds to step 216.

When the process proceeds to step 215 after step 212, the command output to each position adjustment motor 21 is stopped and the process proceeds to step 216.
In step 216, the microphone position stored in the RAM 32b is stored in the address of the storage device 33 corresponding to the numeric key button in the ON state of the user selection switch 7.
Finally, in step 217, the numeric key button of the user selection switch 7 is blinked for a while to inform the operator of the completion of registration, and then returns to the lighting state indicating the on state. Thereafter, the registration switch 9 is automatically turned off, and this series of processing ends.

Next, based on FIG. 8, the flow of control for selecting the stored microphone position and setting the microphone 2 at an appropriate position for the operator will be described. The following processing flow is processed as a program of the CPU 31.
The operator sets the seat in a state suitable for him.
In step 301, it is checked whether or not the numeric key button of the user selection switch 7 is on. If any of the numeric key buttons is on, the process proceeds to step 302. If not, step 301 is repeated.

In step 302, the target position of the microphone position is read from the address of the storage device 33 corresponding to the numeric button on which the user selection switch 7 is turned on.
In step 303, the position signal of the current microphone position indicated by each position sensor 23 is read. In step 304, the current position is compared with the target position.
In step 305, the moving direction can be determined from the comparison result, and a command signal to each position adjustment motor 21 is output. In step 306, the position adjustment motor is driven according to the command signal.
In step 307, it is checked whether the target position matches the current position. If they do not match, the process returns to step 304 and steps 304 to 307 are repeated until they match. If they match, the process proceeds to step 308.

In step 308, it is checked whether or not the voice recognition start switch 6a is turned on. If it is not turned on, step 308 is repeated, and if it is turned on, the process proceeds to step 309 to start the speech recognition process.
In step 310, it is checked whether or not the voice recognition end switch 6b is turned on. If turned on, the process ends. If not, the voice recognition process continues.

  The position adjustment motors 21a, 21b, and 21c of the present embodiment are the drive means of the present invention, the position sensors 23a, 23b, and 23c are the attachment state detection means, the user selection switch 7 is the user selection means, and the storage device 33. Constitutes storage means. Also, steps 101 and 102 of the flowchart are the attachment state change output means of the present invention, steps 105 and 107 and 108, or step 216 is the storage instruction means, step 201 is the automatic adjustment start means, and steps 302 to 307 are drive instructions. Configure the means.

As described above, according to the present embodiment, an operator once searches for and registers an appropriate microphone position by manual microphone position adjustment using the microphone position adjustment switch 8 or microphone position adjustment by the automatic adjustment switch 11. By doing so, it is possible to always set the microphone position appropriate for the user by operating the user selection switch 7, and the accuracy of voice recognition can be maintained constant.
When a single vehicle is used by a plurality of people, it is convenient because a microphone position suitable for each person can be set by a simple selection operation.

Next, a modification of the control flow of the automatic microphone position adjustment according to the present embodiment will be described with reference to FIG.
In this modification, steps 201 to 208 in FIG. 6 are the same except that the predetermined movement pattern in step 204 is different, and thus description thereof is omitted.
The movement pattern in this modification is, for example, a reference position set at approximately the center of the movable range in the left-right direction and the front-rear direction, and a movement pattern of a plurality of ellipses having different diameters surrounding the reference position or a spiral movement extending outward from the reference position It is a pattern.
First, the microphone position is moved up and down at the reference position to store the rate of change in volume level due to the change in directivity, and then the microphone 2 is moved in the above movement pattern in a state where it is stored in the cylinder 24.
After step 208, the process proceeds to step 401.
In step 401, the current target position and volume level of the movement pattern are set and stored in the RAM 32b.

In step 402, it is checked whether or not a predetermined movement pattern position sequence has been completed. If not completed, the process returns to step 204 to continue the movement of the microphone position, and steps 204 to 208 and steps 401 to 402 are repeated. If the position sequence is completed, the process proceeds to step 403.
In step 403, the position of the position sequence stored in the RAM 32b and the volume level corresponding to the position are read, and the sound field is calculated.

In step 404, the target microphone position that is the target volume is estimated from the calculated sound field.
The sound field is obtained with respect to a reference position and a plurality of ellipse movement patterns surrounding the reference position or a spiral movement pattern extending outward from the reference position.
Accordingly, it is possible to estimate how far the sound volume level has a maximum point at a position away from the reference position in which direction by, for example, spline interpolation of the sound volume level with respect to the position coordinates. When the estimated sound volume at that position does not reach the target sound volume level, a corrected position where the microphone 2 is lowered to the open end side of the tube 24 is calculated. The position is stored in the RAM 32b.

In step 405, the target microphone position and the current microphone position from the position sensor 23 are compared.
In step 406, a command signal is output to each position adjustment motor 21.
In step 407, the position adjustment motor 21 is driven according to the command signal.
In step 408, it is checked whether or not the position signal from the position sensor 23 matches the target position. If they do not match, the process returns to step 405, and steps 405 to 408 are repeated. If they match, the process proceeds to step 409.
In step 409, the microphone position stored in the RAM 32b is stored in the address of the storage device 33 corresponding to the numeric key button in the ON state of the user selection switch 7.
Finally, in step 410, the numeric key button of the user selection switch 7 blinks for a while to inform the operator of the completion of registration, and then returns to the lighting state indicating the on state. Thereafter, the registration switch 9 is automatically turned off, and this series of processing ends.
Step 409 of this modification constitutes a storage instruction means of the present invention.

  According to this modification, the movement pattern in the case of automatic adjustment is not a sequential search of the maximum volume, but is a method of estimating after obtaining the sound field from the reference center position by an elliptical movement pattern or a spiral movement pattern, It takes less time for the person to speak a certain volume.

In the present embodiment or modification, the microphone 2 is an example installed on the front ceiling of the vehicle interior, and the microphone 2 can be moved in the front-rear direction, the left-right direction, and the up-down direction. However, the present invention is not limited to this. Absent. For example, as shown in FIG. 10, it is installed on the instrument panel in front of the driver's seat, and the microphone position is set back and forth by the position adjusting motor 21b, and the position and position adjusting motor 21c is set back and forth in the cylinder 24, and the upward angle is positioned. The adjustment motor 21a 'may be changed. In this figure, the position sensor 23 provided in each position adjustment motor is not shown.
Further, the configuration for moving the microphone position is a wire drive by a motor, and a drive nut and screw shaft by a motor, but is not limited thereto.
In the above-described embodiment, the example in which the microphone is provided in the vehicle interior has been described. However, for example, it is installed on a microphone used by an operator of a customer support center or a telephone exchange office in a company or a podium used for a lecture or the like. The same effect can be obtained even when applied to a microphone.

It is a block diagram which shows the structure of embodiment which applied this invention. It is a figure explaining arrangement | positioning of a position adjustment motor. It is a figure explaining the position which attaches a microphone in a vehicle interior. It is a figure explaining the change of directivity by the position of a microphone. It is a figure explaining the flow of control which adjusts a microphone position manually and registers. It is a figure explaining the flow of control which adjusts a microphone position automatically and registers. It is a figure explaining the flow of control which adjusts a microphone position automatically and registers. It is a figure explaining the flow of control which adjusts a microphone position to the position selected by operating a user selection switch. It is a figure explaining the flow of control which adjusts and registers a microphone position automatically in a modification. It is a figure explaining the case where a microphone is installed on an instrument panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Voice recognition control unit 2 Microphone 3 Display 4 Speaker 5 Selection decision switch 6a Voice recognition start switch 6b Voice recognition end switch 7 User selection switch 8 Microphone position adjustment switch 9 Registration switch 10 Volume indicator 11 Automatic adjustment switch 21a, 21a ' , 21b, 21c Position adjustment motor 22a, 22b, Drive drum 22c Drive nut 23a, 23b, 23c Position sensor 24 Tube 25X, 25Y Guide rail 26X, 26Y Drum 27X, 27Y Wire 28X, 28Y Base 29a Guide projection 29b Screw shaft 31 Center Arithmetic processing device 32a Read only memory 32b Random access memory 33 Storage device 34a A / D converter 34b D / A converter 41 Knob switch 42L Left switch 2R rightward switch 42F forward switch 42B-rear direction switch 43 maplight 44 windshield 45 rearview mirror 46 a sun visor

Claims (8)

A microphone that can change the mounting state,
An attachment state change output means for outputting an instruction to change the attachment state of the microphone based on an operation instruction by a user;
Drive means for driving to change the attachment state of the microphone based on the change instruction output by the attachment state change output means;
An attachment state detecting means for detecting the attachment state of the microphone;
A user selection means for selecting a user based on an operation instruction by the user;
Storage means for storing the attachment state detected by the attachment state detection means for each user;
Based on an operation instruction by a user, storage instruction means for storing the attachment state when operated in the storage means;
When the user is selected by the user selection means, a drive that outputs a drive instruction to the drive means so as to be in the mounting state stored in the storage means corresponding to the selected user A microphone control apparatus comprising: an instruction output unit. A microphone that can change the mounting state,
Drive means for driving to change the mounting state of the microphone;
An attachment state detecting means for detecting the attachment state of the microphone;
A user selection means for selecting a user based on an operation instruction by the user;
Storage means for storing the attachment state detected by the attachment state detection means for each user;
Automatic adjustment start means for driving the drive means so as to have a predetermined movement pattern based on an operation instruction by a user;
Storage instruction means for storing in the storage means an attachment state in which the sound collection of the microphone is maximum when driven by the automatic adjustment start means;
When the user is selected by the user selection means, a drive that outputs a drive instruction to the drive means so as to be in the mounting state stored in the storage means corresponding to the selected user A microphone control apparatus comprising: an instruction output unit. The microphone control apparatus according to claim 1, wherein the microphone is attached at least one of an attachment position and an attachment angle with respect to a user. The microphone control apparatus according to claim 1, wherein the driving unit changes the attachment state so as to change the directivity of the microphone. It has a cylinder in which a microphone is accommodated at one end and the driving means is disposed at the other end,
The microphone control apparatus according to claim 4, wherein the driving unit changes the directivity by moving the microphone in an axial direction of the cylinder. The microphone control apparatus according to claim 1, wherein the microphone is provided in a vehicle interior. Based on the operation instruction by the user, the microphone that can change the mounting state is changed by the driving means, and the mounting state is stored for each user,
Thereafter, when the user is selected, the microphone is driven so as to be in the stored attachment state. The mounting state of the microphone whose mounting state can be changed is changed by the driving means according to a predetermined movement pattern, and stored for each user in the mounting state where the sound collection of the microphone is maximized,
Thereafter, when the user is selected, the microphone is driven so as to be in the stored attachment state.

Images